More pics of Auckland SkyTower installation

[nrgkits.nz]

I had another chance to tour the TX room earlier this year in the top of Aucklands Skytower.
There is a previous thread here:
viewtopic.php?t=1185

I now have some better photos of all the heavy filtering

IMG_0919.JPG

All the heavy filters coupled together lining the outside wall of the tower, this is near the start where the first transmitter is fed in, each filter takes a feed from one transmitter.

IMG_0916.JPG

Towards the end of the train of filters, the pipes linking the filters and couplers get thicker.

IMG_0918.JPG

The last filter connects into a series of meters where power and swr is measured

In my last post I said there were three different antenna systems, I was actually wrong. There are only two antenna systems, the first is the main 8 stack of circulars, the second is a 4 stack of dipoles.

Standard channel spacing is 800Khz, there are a few instances where some stations are spaced 400Khz apart. All the stations with 800Khz spacing are fed into the 8 stack, stations with 400Khz spacing (3 of them) are placed in between and fed into the 4 stack.

IMG_0926.JPG

Separate group of filters multiplexing into the 4 stack of dipoles.

[MiXiN]

Very nice.

A baghead would have a field day with all that Copper in there.